vadersing

iTrader: (8)

Will a 120a esc in blinky mode have an advantage over a 45a spec class esc?

I intend to compete in 13.5t and 17.5t touring car non-boost class

Thanks

hyujmn

iTrader: (27)

I can't see how it would.

I assume you're comparing a Hobbywing 120a to a Justock 45a. For stock racing, a Justock is a great choice.

Eivind E

Sorry to bump an old thread, but this is related to the same question.
It seems to me that the 120A, Xtreme Stock and Justock weigh in differently.
How significant would you think this weight would be, if it is say 20 grams, or at worst 30 grams?

Would that nullify any difference in internal resistance? Or does the IR of 0.0003 vs 0.0006 vs 0.0008 make a big difference?

I'm not used to electric so I have to ask.

hyujmn

iTrader: (27)

No difference in blinky except with respect to weight distribution.

I've run the v2.1 120a, 60a, 90a, Justock, Xtreme Stock and Stock Spec. Doesn't make a single bit of difference which one you choose.

frozenpod

iTrader: (1)

Probably find the size wire (weight) you use has more of an effect on lap times than the volt drop of the ESC.

Eivind E

Ok, so you'd think that 14awg instead of 12awg, for weightsaving, and the 20 gram lighter esc might be an advantage then?

Because one could easily assume thicker wire would be leading more current?

Thanks for the replies

TeamThibault

So looking for a budget roar ESC what do you guys like the most

hyujmn

iTrader: (27)

Didn't you... just read through this thread?

grippgoat

iTrader: (8)

It depends on your chassis, battery, servo, motor, body, and min weight limit.

For example, with an Xray T4 2014, Sanwa SRG-BLS (2-3g heavier than some servos), a 6800mah battery (325g), LRP x20 (165g, lighter than some motors), and LRP Flow Worksteam (4xg), and a motor fan behind the motor (10g), I have to hang the ESC off the chassis about 4mm for left/right balance, and add 20+ grams in the middle to meet min weight of 1380g. That's with long 12ga wires and a LW body. So with that setup, a heavier esc would be totally fine, because I coud remove weight and move the ESC inboard.

If I ran an Mi4 or Mi5, or a tub chassis car, I'd want a lighter battery to keep weight down, and probably even opt for 14ga wire. Similar would be true if I had a european 1350g min weight. And then I wouldn't want to go with a heavier ESC.

-Mike

xevias

iTrader: (1)

Don't forget that (if comparing a HW v3.1 with a HW Justock) you may not get more speed out of the v3.1, but you will get more tuning options. Like more drag brake steps.

old_dude

iTrader: (1)

Internal resistance is the issue. We have dyno tested a few "blinky" ESC's and where all are equal on the rpm they let a motor produce, they are not equal when it comes to the torque they let it produce.
Also as stated the programmability of them can give advantages in torque control and braking.

bertrandsv87

iTrader: (2)

Novak impact esc is perfect for blinky !!!

JiuHaWong

Which ones did you find produced the most torque?

bertrandsv87

iTrader: (2)

The torque difference is minimal, and will not yield better performance at all.....

old_dude

iTrader: (1)

Hobbywing was better than Tekin or Novak. Tekin and HW had the same peak rpm from motor but the HW showed much better torque. That is why the oval racers prefer them. Castle seems to show very good on the track also but not tested. Testing was done on a TurboDyno setup for sensored/brushless. New HW's (V3 and 3.1) seem to be better yet but from a performance standpoint in oval but we did not dyno them.
Oval racing is the true test of torque in your motor, battery and esc combo. If any one is a little weak it will show up. Racers hunt for hundredths of a second per lap. At the Spektrum/CRC race .05/lap was the difference between the "A" and the "C".
In on-road the variability in lap time mainly comes from driving inconsistency. A good oval racer can keep his laps within a couple of tenths when not in traffic.
I actually look for my top 20 average to be .1 slower than my fast lap and my last 5 to be about .3 off of the fast lap from motor heat and lower voltage.